In summary, we have reported an experimental study confirming a proof of concept that rogue waves can appear from a localized PSP in a regular wave train. Such PSP can be for instance constructed from breather solutions of the nonlinear Schrödinger equation and then, seeded in a condensate. Our wave tank measurements underline that nonlinear focusing can be exhibited by PSP confirming yet another focusing mechanism beyond the wave modulation or superposition principle. We anticipate future experimental studies exploring such focusing dynamics in various wave systems governed by dispersion and nonlinearity [1]}, [2]}, [3]} and also the development of theoretical techniques to predict such dynamics within the NLSE framework and beyond [4]}, [5]}.
